报道了一种获得连续径向偏振激光输出的半导体端面抽运全固态激光器。采用YAG+Nd:YAG+YAG键合晶体作为激光激活介质,并利用光子晶体光栅作为偏振选择元件以及激光器的输出耦合镜,晶体在吸收2 W抽运光时,最大输出264 mW径向偏振激光,且偏振纯度为96.5%,对应斜坡效率为58.1%。

An end-pumped solid-state laser emiting radially polarized laser beam was reported. The bonded Nd:YAG crystal was applied as gain medium with the structure of YAG+Nd:YAG+YAG. The radially polarized mode was excited by employing photonic crystal grating as the polarization-selective element and the output coupler. In the condition of 2 W absorbed pumping power,the radially polarized laser output power reaches to 264 mW with a polarization purity of 96.5% and a slope efficiency of 58.1%.